Our Mendocino motor is an ingenious little device that operates using the power supplied by the 4 vertically shaft mounted solar panels that are arranged around a freely spinning central axis with a magnet mounted inside. The solar panels feed electrical energy to the magnet wire loops arranged around the central axis mounted magnet, which induces the engine to spin. The engine is driven by the induction between the energized coils and the central axis mounted neodymium magnet. This motor is fascinating and educational! This item ships free to US addresses.